https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63387
John Zwinck <jzwinck at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #9 from John Zwinck <jzwinck at gmail dot com> --- I confirm this is fixed in GCC 6.1. Thank you very much.